CVE - CVE-2025-22036

CVE-ID
CVE-2025-22036	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: exfat: fix random stack corruption after get_block When get_block is called with a buffer_head allocated on the stack, such as do_mpage_readpage, stack corruption due to buffer_head UAF may occur in the following race condition situation. <CPU 0> <CPU 1> mpage_read_folio <<bh on stack>> do_mpage_readpage exfat_get_block bh_read __bh_read get_bh(bh) submit_bh wait_on_buffer ... end_buffer_read_sync __end_buffer_read_notouch unlock_buffer <<keep going>> ... ... ... ... <<bh is not valid out of mpage_read_folio>> . . another_function <<variable A on stack>> put_bh(bh) atomic_dec(bh->b_count) * stack corruption here * This patch returns -EAGAIN if a folio does not have buffers when bh_read needs to be called. By doing this, the caller can fallback to functions like block_read_full_folio(), create a buffer_head in the folio, and then call get_block again. Let's do not call bh_read() with on-stack buffer_head.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1bb7ff4204b6d4927e982cd256286c09ed4fd8ca URL:https://git.kernel.org/stable/c/1bb7ff4204b6d4927e982cd256286c09ed4fd8ca MISC:https://git.kernel.org/stable/c/49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2 URL:https://git.kernel.org/stable/c/49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2 MISC:https://git.kernel.org/stable/c/f7447286363dc1e410bf30b87d75168f3519f9cc URL:https://git.kernel.org/stable/c/f7447286363dc1e410bf30b87d75168f3519f9cc MISC:https://git.kernel.org/stable/c/f807a6bf2005740fa26b4f59c4a003dc966b9afd URL:https://git.kernel.org/stable/c/f807a6bf2005740fa26b4f59c4a003dc966b9afd
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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